CN109004832A - Pyatyi phase buck type DC/DC converter and Pyatyi two-phase buck converter - Google Patents
Pyatyi phase buck type DC/DC converter and Pyatyi two-phase buck converter Download PDFInfo
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- CN109004832A CN109004832A CN201810878540.8A CN201810878540A CN109004832A CN 109004832 A CN109004832 A CN 109004832A CN 201810878540 A CN201810878540 A CN 201810878540A CN 109004832 A CN109004832 A CN 109004832A
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- striding capacitance
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- complementary switch
- pyatyi
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
Abstract
The invention discloses a kind of Pyatyi phase buck type DC/DC converter and Pyatyi two-phase buck converters, including control chip, 4 pairs of complementary switch, inductance, capacitor, resistance, the first striding capacitance and the second striding capacitance, 4 pairs of complementary switch include the first PMOS tube and the first NMOS tube, the second PMOS tube and the second NMOS tube, third PMOS tube and third NMOS tube, the 4th PMOS tube and the 4th NMOS tube；Control chip is used to be switched on or off complementary switch by control 4, realizes the conversion of five step voltages.It can be seen that, the Pyatyi phase buck type DC/DC converter of the application can realize that five step voltages are converted only with two striding capacitances, compared with existing Pyatyi phase buck converter, reduce the quantity of striding capacitance, to reduce the energy of striding capacitance loss, and reduce the chip area of striding capacitance occupancy.
Description
Technical field
The present invention relates to field of electronic devices, more particularly to a kind of Pyatyi phase buck type DC/DC converter and Pyatyi
Two-phase buck converter.
Background technique
Currently, DC/DC converter is divided into three classes: step-up DC/DC converter, voltage-dropping type DC/DC converter and buck
Type DC/DC converter.Wherein, voltage-dropping type DC/DC converter generally includes second level phase buck converter, three-level phase buck turns
Parallel operation and Pyatyi phase buck converter, since Pyatyi phase buck converter can make the input node for the inductance for including in it real
Existing five step voltages, which are converted, (sets the input voltage of Pyatyi buck converter as Vin, the input node of inductance can input Vin、0.75Vin、
0.5Vin、0.25Vin, 0 five step voltages), reduce inductance ripple current in terms of it is advantageous, so Pyatyi phase buck convert
Device is using more.But in the prior art, 4 striding capacitances are set in Pyatyi phase buck converter need, due to striding capacitance
Quantity is more, so the energy of its loss is more, and the area for occupying place chip is larger.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art needs to solve at present
The problem of.
Summary of the invention
The object of the present invention is to provide a kind of Pyatyi phase buck type DC/DC converter and Pyatyi two-phase buck converter,
The conversion of five step voltages can be achieved, compared with existing Pyatyi phase buck converter, reduce the quantity of striding capacitance, to drop
The energy of low striding capacitance loss, and reduce the chip area of striding capacitance occupancy.
In order to solve the above technical problems, the present invention provides a kind of Pyatyi phase buck type DC/DC converter, including control
Chip, 4 pairs of complementary switch, inductance, capacitor, resistance, the first striding capacitance and the second striding capacitance, 4 pairs of complementary switch packets
Include the first PMOS tube and the first NMOS tube, the second PMOS tube and the second NMOS tube, third PMOS tube and third NMOS tube, the 4th
PMOS tube and the 4th NMOS tube, in which:
Input terminal of the source electrode of first PMOS tube as converter, first to fourth PMOS tube is according to drain electrode and source electrode
Connection type be sequentially connected in series, the 4th PMOS tube drain electrode respectively with the first end of the inductance and the 4th NMOS tube
Drain electrode connection, the four to the first NMOS tube is sequentially connected in series according to source electrode and the connection type of drain electrode, the first NMOS
The source electrode of pipe is grounded, and the second end of the inductance is connect with the first end of the first end of the capacitor and the resistance respectively,
The second end of output end of the common end as the converter, the second end of the capacitor and the resistance is grounded；
First striding capacitance and second striding capacitance bridge respectively under the premise of not being connected across same position
Between any two pairs of adjacent complementary switch；Wherein, the striding capacitance being connected across between n-th pair and (n+1)th pair of complementary switch
The full piezoelectric voltage at both ends be equal to the converter input voltage (4-n)/4, n=1,2,3；
The control chip is used to be switched on or off the complementary switch by control 4, realizes the conversion of five step voltages.
Preferably, first striding capacitance is connected across third between complementary switch and the 4th pair of complementary switch, described
Second striding capacitance is connected across second pair of complementary switch and third between complementary switch；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, and described second flies across electricity
The full piezoelectric voltage for holding both ends is equal to the 1/2 of the input voltage.
Preferably, first striding capacitance is connected across third between complementary switch and the 4th pair of complementary switch, described
Second striding capacitance is connected across between first pair of complementary switch and second pair of complementary switch；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, and described second flies across electricity
The full piezoelectric voltage for holding both ends is equal to the 3/4 of the input voltage.
Preferably, first striding capacitance is connected across second pair of complementary switch and third between complementary switch, described
Second striding capacitance is connected across between first pair of complementary switch and second pair of complementary switch；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/2 of the input voltage, and described second flies across electricity
The full piezoelectric voltage for holding both ends is equal to the 3/4 of the input voltage.
In order to solve the above technical problems, the present invention also provides a kind of Pyatyi phase buck type DC/DC converter, including control
Combinations piece, 4 pairs of complementary switch, inductance, capacitor, resistance, the first striding capacitance, the second striding capacitance and third striding capacitance, 4 pairs
The complementary switch includes the first PMOS tube and the first NMOS tube, the second PMOS tube and the second NMOS tube, third PMOS tube and the
Three NMOS tubes, the 4th PMOS tube and the 4th NMOS tube, in which:
Input terminal of the source electrode of first PMOS tube as converter, first to fourth PMOS tube is according to drain electrode and source electrode
Connection type be sequentially connected in series, the 4th PMOS tube drain electrode respectively with the first end of the inductance and the 4th NMOS tube
Drain electrode connection, the four to the first NMOS tube is sequentially connected in series according to source electrode and the connection type of drain electrode, the first NMOS
The source electrode of pipe is grounded, and the second end of the inductance is connect with the first end of the first end of the capacitor and the resistance respectively,
The second end of output end of the common end as the converter, the second end of the capacitor and the resistance is grounded；
First striding capacitance, second striding capacitance and the third striding capacitance be not connected across same position
Under the premise of, first striding capacitance and second striding capacitance be connected across respectively any two pairs of adjacent complementary switch it
Between, the third striding capacitance be connected across between remaining two pairs of adjacent complementary switch or the input terminal of the converter with
Between ground；Wherein, the full piezoelectric voltage at the striding capacitance both ends between n-th pair and (n+1)th pair of complementary switch is connected across equal to described
(4-n)/4, n=1 of converter input voltage, 2,3；The striding capacitance two being connected across between the input terminal and ground of the converter
The full piezoelectric voltage at end is equal to the input voltage；
The control chip is used to be switched on or off the complementary switch by control 4, realizes the conversion of five step voltages.
Preferably, first striding capacitance is connected across third between complementary switch and the 4th pair of complementary switch, described
Second striding capacitance is connected across second pair of complementary switch and third between complementary switch, and the third striding capacitance is connected across
Between a pair of of complementary switch and second pair of complementary switch；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, and described second flies across electricity
The full piezoelectric voltage for holding both ends is equal to the 1/2 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to described
The 3/4 of input voltage.
Preferably, first striding capacitance is connected across third between complementary switch and the 4th pair of complementary switch, described
Second striding capacitance is connected across second pair of complementary switch and third between complementary switch, and the third striding capacitance is connected across institute
It states between the input terminal of converter and ground；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, and described second flies across electricity
The full piezoelectric voltage for holding both ends is equal to the 1/2 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to described
Input voltage.
Preferably, first striding capacitance is connected across third between complementary switch and the 4th pair of complementary switch, described
Second striding capacitance is connected across between first pair of complementary switch and second pair of complementary switch, and the third striding capacitance is connected across institute
It states between the input terminal of converter and ground；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, and described second flies across electricity
The full piezoelectric voltage for holding both ends is equal to the 3/4 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to described
Input voltage.
Preferably, first striding capacitance is connected across second pair of complementary switch and third between complementary switch, described
Second striding capacitance is connected across between first pair of complementary switch and second pair of complementary switch, and the third striding capacitance is connected across institute
It states between the input terminal of converter and ground；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/2 of the input voltage, and described second flies across electricity
The full piezoelectric voltage for holding both ends is equal to the 3/4 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to described
Input voltage.
In order to solve the above technical problems, the present invention also provides a kind of Pyatyi two-phase buck converter, including it is any of the above-described
Kind Pyatyi phase buck type DC/DC converter, further includes:
With circuit structure and internal each device of the Pyatyi phase buck type DC/DC converter after removal capacitor, resistance
The identical another phase Pyatyi buck converter of part type selecting；Wherein, Pyatyi two-phase buck converter included two first
The source electrode of PMOS tube connects, input terminal of the common end as the Pyatyi two-phase buck converter, the Pyatyi two-phase decompression
The second end for two inductance that converter is included connects, output of the common end as the Pyatyi two-phase buck converter
End.
The present invention provides a kind of Pyatyi phase buck type DC/DC converters, including control chip, 4 pairs of complementary switch, electricity
Sense, capacitor, resistance, the first striding capacitance and the second striding capacitance, 4 pairs of complementary switch include the first PMOS tube and the first NMOS
Pipe, the second PMOS tube and the second NMOS tube, third PMOS tube and third NMOS tube, the 4th PMOS tube and the 4th NMOS tube, in which:
Input terminal of the source electrode of first PMOS tube as converter, first to fourth PMOS tube according to drain electrode and the connection type of source electrode according to
The drain electrode of secondary series connection, the 4th PMOS tube is connect with the drain electrode of the first end of inductance and the 4th NMOS tube respectively, and the four to the first
NMOS tube is sequentially connected in series according to source electrode and the connection type of drain electrode, the source electrode ground connection of the first NMOS tube, the second end difference of inductance
It is connect with the first end of the first end of capacitor and resistance, output end of the common end as converter, the second end and electricity of capacitor
The second end of resistance is grounded；First striding capacitance and the second striding capacitance under the premise of not being connected across same position, respectively across
It is connected between any two pairs of adjacent complementary switch；Wherein, it is connected across between n-th pair and (n+1)th pair of complementary switch and flies across electricity
Hold both ends full piezoelectric voltage be equal to converter input voltage (4-n)/4, n=1,2,3；Chip is controlled to be used for through 4 pairs of control
Complementary switch is switched on or off, and realizes the conversion of five step voltages.
As it can be seen that the Pyatyi phase buck type DC/DC converter of the application can realize Pyatyi only with two striding capacitances
Voltage conversion, compared with existing Pyatyi phase buck converter, reduces the quantity of striding capacitance, flies to reduce across electricity
Hold the energy of loss, and reduces the chip area of striding capacitance occupancy.
The present invention also provides another Pyatyi phase buck type DC/DC converter and Pyatyi two-phase buck converter (with
Existing Pyatyi phase buck converter composition two-phase buck converter is compared), have with above-mentioned phase buck converter identical
Beneficial effect.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the first Pyatyi phase buck type DC/DC converter provided by the invention；
Fig. 2 is the structural schematic diagram of second of Pyatyi phase buck type DC/DC converter provided by the invention；
Fig. 3 is the structural schematic diagram of the third Pyatyi phase buck type DC/DC converter provided by the invention；
Fig. 4 is a kind of structural schematic diagram of second level phase buck converter in the prior art；
Fig. 5 is a kind of structural schematic diagram of three-level phase buck converter in the prior art；
Fig. 6 (1) is the operation schematic diagram of the first working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 6 (2) is the operation schematic diagram of second of working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 6 (3) is the operation schematic diagram of the third working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 6 (4) is the operation schematic diagram of the 4th kind of working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 6 (5) is the operation schematic diagram of the 5th kind of working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 6 (6) is the operation schematic diagram of the 6th kind of working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 6 (7) is the operation schematic diagram of the 7th kind of working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 6 (8) is the operation schematic diagram of the 8th kind of working condition of converter shown in a kind of Fig. 1 provided by the invention；
Fig. 7 is the structural schematic diagram of the 4th kind of Pyatyi phase buck type DC/DC converter provided by the invention；
Fig. 8 is the structural schematic diagram of the 5th kind of Pyatyi phase buck type DC/DC converter provided by the invention；
Fig. 9 is the structural schematic diagram of the 6th kind of Pyatyi phase buck type DC/DC converter provided by the invention；
Figure 10 is the structural schematic diagram of the 7th kind of Pyatyi phase buck type DC/DC converter provided by the invention；
Figure 11 is a kind of structural schematic diagram of Pyatyi two-phase buck converter provided by the invention；
Figure 12 is the switch frequency of a kind of Pyatyi phase buck converter and Pyatyi two-phase buck converter provided by the invention
The comparison of wave shape figure of rate and inductive current peak.
Specific embodiment
Core of the invention is to provide a kind of Pyatyi phase buck type DC/DC converter and Pyatyi two-phase buck converter,
The conversion of five step voltages can be achieved, compared with existing Pyatyi phase buck converter, reduce the quantity of striding capacitance, to drop
The energy of low striding capacitance loss, and reduce the chip area of striding capacitance occupancy.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1, Fig. 2 and Fig. 3 are please referred to, Fig. 1 is the first Pyatyi phase buck type DC/DC converter provided by the invention
Structural schematic diagram, Fig. 2 are the structural schematic diagram of second of Pyatyi phase buck type DC/DC converter provided by the invention, and Fig. 3 is
The structural schematic diagram of the third Pyatyi phase buck type DC/DC converter provided by the invention.
First kind Pyatyi phase buck type DC/DC converter provided by the present application include: control chip (be not shown in the figure,
But converter include this control chip), 4 pairs of complementary switch, inductance L, capacitor Co, resistance Ro, the first striding capacitance CF1 and second
Striding capacitance CF2,4 pairs of complementary switch include the first PMOS tube P1 and the first NMOS tube N1 (first pair of complementary switch), second
(third is to complementation by PMOS tube P2 and the second NMOS tube N2 (second pair of complementary switch), third PMOS tube P3 and third NMOS tube N3
Switch), the 4th PMOS tube P4 and the 4th NMOS tube N4 (the 4th pair of complementary switch), in which:
Input terminal of the source electrode of first PMOS tube P1 as converter, first to fourth PMOS tube is according to drain electrode and source electrode
Connection type is sequentially connected in series that (i.e. the drain electrode of the first PMOS tube P1 is connect with the source electrode of the second PMOS tube P2, the second PMOS tube P2's
Drain electrode is connect with the source electrode of third PMOS tube P3, and the drain electrode of third PMOS tube P3 is connect with the source electrode of the 4th PMOS tube P4), the 4th
The drain electrode of PMOS tube P4 is connect with the drain electrode of the first end of inductance L and the 4th NMOS tube N4 respectively, and the four to the first NMOS tube is pressed
According to source electrode and drain electrode connection type be sequentially connected in series (i.e. the source electrode of the 4th NMOS tube N4 is connect with the drain electrode of third NMOS tube N3,
The source electrode of third NMOS tube N3 is connect with the drain electrode of the second NMOS tube N2, the source electrode of the second NMOS tube N2 and the first NMOS tube N1's
Drain electrode connection), the source electrode of the first NMOS tube N1 ground connection, the second end of inductance L respectively with the first end of capacitor Co and resistance Ro
First end connection, output end of the common end as converter, the second end of capacitor Co and the second end of resistance Ro are grounded；
First striding capacitance CF1 and the second striding capacitance CF2 are connected across respectively under the premise of not being connected across same position
Between any two pairs of adjacent complementary switch；Wherein, the striding capacitance two being connected across between n-th pair and (n+1)th pair of complementary switch
End full piezoelectric voltage be equal to converter input voltage (4-n)/4, n=1,2,3；
Control chip is used to be switched on or off complementary switch by control 4, realizes the conversion of five step voltages.
Specifically, referring to figure 4. and Fig. 5, Fig. 4 are that a kind of structure of second level phase buck converter in the prior art is shown
It is intended to, Fig. 5 is a kind of structural schematic diagram of three-level phase buck converter in the prior art.First to multistage phase buck type
The basic principle of DC/DC converter is simply introduced:
The ripple current of known inductance L:Wherein, ILmaxTo flow through inductance L's
Maximum current value, ILminFor the minimum current value for flowing through inductance L, D is the duty ratio of switching drive signal, FswFor switching frequency, l
For inductance value, Δ V is the voltage swing of the input node of inductance L.When the ripple current of inductance L increases, the loss of converter
Also increase, so, in order to reduce the ripple current of inductance L, the general voltage swing Δ V using the input node for reducing inductance L
To reduce the ripple current Δ i of inductance LL.In Fig. 4, second level phase buck converter can make inductance input node VxRealize Vin、0
Secondary voltage is converted, at this time Δ V=Vin；In Fig. 5, three-level phase buck converter can make inductance input node VxRealize Vin、
0.5Vin, 0 tertiary voltage conversion, Δ V=0.5V at this timein；Pyatyi phase buck converter can make inductance input node VxIt realizes
Vin、0.75Vin、0.5Vin、0.25Vin, the conversion of 0 five step voltages, Δ V=0.25V at this timein, so Pyatyi phase buck converter
It is advantageous in terms of the ripple current for reducing the inductance L for including in it.As it can be seen that in the identical ripple current of inductance, phase
Than in second level, three-level phase buck converter, smaller inductance is can be used in Pyatyi phase buck converter.
In view of the quantity for setting striding capacitance in existing Pyatyi phase buck converter is more, lead to the energy of its loss
It is more, and the area for occupying place chip is larger, so the application uses the structure of Fig. 1 or Fig. 2 or Fig. 3, flies only with two
It can realize that five step voltages are converted across capacitor, to reduce the quantity of striding capacitance, reduce the energy of striding capacitance loss,
And reduce the chip area of striding capacitance occupancy.
In Fig. 1, the first striding capacitance CF1 is connected across third between complementary switch and the 4th pair of complementary switch, and second flies
Across capacitor CF2 is connected across second pair of complementary switch and third between complementary switch；The then full electricity at the first both ends striding capacitance CF1
Voltage is equal to input voltage (size Vin) 1/4, the full piezoelectric voltage at the second both ends striding capacitance CF2 is equal to the 1/ of input voltage
2。
In Fig. 2, the first striding capacitance CF1 is connected across third between complementary switch and the 4th pair of complementary switch, and second flies
Across capacitor CF2 is connected across between first pair of complementary switch and second pair of complementary switch；The then full electricity at the first both ends striding capacitance CF1
Voltage is equal to the 1/4 of input voltage, and the full piezoelectric voltage at the second both ends striding capacitance CF2 is equal to the 3/4 of input voltage.
In Fig. 3, the first striding capacitance CF1 is connected across second pair of complementary switch and third between complementary switch, and second flies
Across capacitor CF2 is connected across between first pair of complementary switch and second pair of complementary switch；The then full electricity at the first both ends striding capacitance CF1
Voltage is equal to the 1/2 of input voltage, and the full piezoelectric voltage at the second both ends striding capacitance CF2 is equal to the 3/4 of input voltage.
More specifically, the driving signal of two switches unanimously (is given birth to by control chip in every a pair of complementary switch in the application
At), with D1, (D1=0 represents driving signal as low level to the driving signal of first pair of complementary switch, and D1=1 represents driving signal
For high level, D2, D3, D4 are similarly indicated, it is known that NMOS tube is connected in grid input high level, and PMOS tube inputs low in grid
Electric conducts) it indicates, the driving signal of second pair of complementary switch is indicated with D2, driving signal D3 of the third to complementary switch
It indicates, the driving signal of the 4th pair of complementary switch is indicated with D4, below by taking Fig. 1 as an example, is flown in the first striding capacitance CF1 and second
Under the premise of across capacitor CF2 is fully charged, the principle of five step voltages conversion, which is introduced, to be realized to converter:
Please refer to Fig. 6 (1), the first working condition: (dotted line indicates route in figure by D1=0, D2=0, D3=0, D4=0
In off state), Vx=Vin；It please refers to Fig. 6 (2), second of working condition: D1=0, D2=0, D3=0, D4=1,(For the full piezoelectric voltage at the first both ends striding capacitance CF1)；Please refer to Fig. 6 (3), the third work
State: D1=0, D2=0, D3=1, D4=0,(For the second both ends striding capacitance CF2
Full piezoelectric voltage)；It please refers to Fig. 6 (4), the 4th kind of working condition: D1=0, D2=0, D3=1, D4=1,It please refers to Fig. 6 (5), the 5th kind of working condition: D1=1, D2=1, D3=0, D4=0,It please refers to Fig. 6 (6), the 6th kind of working condition: D1=1, D2=1, D3=0, D4=1,It please refers to Fig. 6 (7), the 7th kind of working condition: D1=1, D2=1, D3=1, D4=0,It please refers to Fig. 6 (8), the 8th kind of working condition: D1=1, D2=1, D3=1, D4=1, Vx=0.
As it can be seen that the converter, just can be defeated for inductance only with two striding capacitances by the driving signal of various combination
Ingress VxThere is provided Pyatyi different voltage: Vin、0.75Vin、0.5Vin、0.25Vin, 0, to reduce the ripple current of inductance L, subtract
The loss of small converter.
In addition, Fig. 2 and Pyatyi phase buck type DC/DC converter shown in Fig. 3 realize the principle of five step voltages conversion, with
Pyatyi phase buck type DC/DC converter shown in FIG. 1 realizes that the principle of five step voltages conversion is similar, and the application is not done in detail herein
Thin narration.
Fig. 7, Fig. 8, Fig. 9 and Figure 10 are please referred to, Fig. 7 turns for the 4th kind of Pyatyi phase buck type DC/DC provided by the invention
The structural schematic diagram of parallel operation, Fig. 8 are the structural representation of the 5th kind of Pyatyi phase buck type DC/DC converter provided by the invention
Figure, Fig. 9 are the structural schematic diagram of the 6th kind of Pyatyi phase buck type DC/DC converter provided by the invention, and Figure 10 is the present invention
The structural schematic diagram of the 7th kind of Pyatyi phase buck type DC/DC converter provided.
Second class Pyatyi phase buck type DC/DC converter provided by the present application include: control chip, 4 pairs of complementary switch,
Inductance L, capacitor Co, resistance Ro, the first striding capacitance CF1, the second striding capacitance CF2 and third striding capacitance CF3,4 pairs of complementations
Switch include the first PMOS tube P1 and the first NMOS tube N1, the second PMOS tube P2 and the second NMOS tube N2, third PMOS tube P3 and
Third NMOS tube N3, the 4th PMOS tube P4 and the 4th NMOS tube N4, in which:
Input terminal of the source electrode of first PMOS tube P1 as converter, first to fourth PMOS tube is according to drain electrode and source electrode
Connection type is sequentially connected in series, and the drain electrode of the 4th PMOS tube P4 connects with the drain electrode of the first end of inductance L and the 4th NMOS tube N4 respectively
It connects, the four to the first NMOS tube is sequentially connected in series according to source electrode and the connection type of drain electrode, the source electrode ground connection of the first NMOS tube N1, electricity
The second end of sense L is connect with the first end of the first end of capacitor Co and resistance Ro respectively, output of the common end as converter
End, the second end of capacitor Co and the second end of resistance Ro are grounded；
First striding capacitance CF1, the second striding capacitance CF2 and third striding capacitance CF3 be not connected across same position
Under the premise of, the first striding capacitance CF1 and the second striding capacitance CF2 are connected across respectively between any two pairs of adjacent complementary switch,
Third striding capacitance CF3 is connected across between remaining two pairs of adjacent complementary switch or between the input terminal and ground of converter；
Wherein, the full piezoelectric voltage for being connected across the striding capacitance both ends between n-th pair and (n+1)th pair of complementary switch is equal to converter input electricity
(4-n)/4, n=1 of pressure, 2,3；The full piezoelectric voltage for being connected across the striding capacitance both ends between the input terminal of converter and ground is equal to
Input voltage；
Control chip is used to be switched on or off complementary switch by control 4, realizes the conversion of five step voltages.
Specifically, in Fig. 7, the first striding capacitance CF1 is connected across third between complementary switch and the 4th pair of complementary switch,
Second striding capacitance CF2 is connected across second pair of complementary switch and third between complementary switch, and third striding capacitance CF3 is connected across
Between first pair of complementary switch and second pair of complementary switch；Then the full piezoelectric voltage at the first both ends striding capacitance CF1 is equal to input electricity
The 1/4 of pressure, the full piezoelectric voltage at the second both ends striding capacitance CF2 are equal to the 1/2 of input voltage, the both ends third striding capacitance CF3
Full piezoelectric voltage is equal to the 3/4 of input voltage.
In Fig. 8, the first striding capacitance CF1 is connected across third between complementary switch and the 4th pair of complementary switch, and second flies
Across capacitor CF2 is connected across second pair of complementary switch and third between complementary switch, and third striding capacitance CF3 is connected across converter
Input terminal and ground between；Then the full piezoelectric voltage at the first both ends striding capacitance CF1 is equal to the 1/4 of input voltage, and second flies across electricity
The full piezoelectric voltage for holding the both ends CF2 is equal to the 1/2 of input voltage, and the full piezoelectric voltage at the both ends third striding capacitance CF3 is equal to input electricity
Pressure.
In Fig. 9, the first striding capacitance CF1 is connected across third between complementary switch and the 4th pair of complementary switch, and second flies
Across capacitor CF2 is connected across between first pair of complementary switch and second pair of complementary switch, and third striding capacitance CF3 is connected across converter
Input terminal and ground between；Then the full piezoelectric voltage at the first both ends striding capacitance CF1 is equal to the 1/4 of input voltage, and second flies across electricity
The full piezoelectric voltage for holding the both ends CF2 is equal to the 3/4 of input voltage, and the full piezoelectric voltage at the both ends third striding capacitance CF3 is equal to input electricity
Pressure.
In Figure 10, the first striding capacitance CF1 is connected across second pair of complementary switch and third between complementary switch, and second flies
Across capacitor CF2 is connected across between first pair of complementary switch and second pair of complementary switch, and third striding capacitance CF3 is connected across converter
Input terminal and ground between；Then the full piezoelectric voltage at the first both ends striding capacitance CF1 is equal to the 1/2 of input voltage, and second flies across electricity
The full piezoelectric voltage for holding the both ends CF2 is equal to the 3/4 of input voltage, and the full piezoelectric voltage at the both ends third striding capacitance CF3 is equal to input electricity
Pressure.
As it can be seen that compared with first kind Pyatyi phase buck type DC/DC converter, the second class Pyatyi phase buck of the application
Type DC/DC converter sets a striding capacitance (but still than the striding capacitance quantity of existing Pyatyi phase buck converter more
It is few, the energy of striding capacitance loss can be equally reduced, and reduce the chip area that striding capacitance occupies), corresponding working condition
Increase, so driving signal of the second class Pyatyi phase buck type DC/DC converter by various combination, equally can be inductance
Input node VxIt provides Pyatyi different voltage, realizes the conversion of five step voltages, realization principle and above-mentioned first kind converter are real
The principle of existing five step voltages conversion is similar, and the application is not described in detail herein.
The present invention also provides a kind of Pyatyi two-phase buck converters, including any of the above-described kind of Pyatyi phase buck type DC/
DC converter, further includes:
It is selected with circuit structure and inside each device of the Pyatyi phase buck type DC/DC converter after removal capacitor, resistance
The identical another phase Pyatyi buck converter of type；Wherein, two the first PMOS that Pyatyi two-phase buck converter is included
The source electrode of pipe connects, input terminal of the common end as Pyatyi two-phase buck converter, and Pyatyi two-phase buck converter is included
Two inductance second end connection, output end of the common end as Pyatyi two-phase buck converter.
Specifically, it is contemplated that the efficiency of phase buck converter is lower, switching frequency is smaller, so the application combination multiphase
Design improves switching frequency, further decreases inductor size realization.Figure 11 is please referred to, Figure 11 is one kind provided by the invention
The structural schematic diagram of Pyatyi two-phase buck converter.Figure 11 is a kind of specific structure of Pyatyi two-phase buck converter, remaining
The introduction of several specific structures refers to the introduction of Figure 11.
Two Pyatyi phase buck converter groups are combined into two-phase framework by the Pyatyi two-phase buck converter of the application, due to
Inductance (the L and L') inductance value having the same of two-phase and identical mechanical periodicity is undergone, so the ripple of the inductance of two-phase
Electric current is equal.
In addition, the net output ripple electric current of multi-phase and step-down converter:
Wherein, m=floor (ND), floor function return to the max-int for being less than parameter, VoutFor multi-phase and step-down converter
Output voltage, N is number of phases.
Figure 12 is please referred to, Figure 12 is that a kind of Pyatyi phase buck converter provided by the invention and the decompression of Pyatyi two-phase are converted
The switching frequency of device and the comparison of wave shape figure of inductive current peak.In Figure 12, Vx1For voltage at the input node of 1 inductance L of phase,
Vx2For voltage at the input node of 2 inductance L' of phase, Δ iL1For the ripple current of 1 inductance L of phase, Δ iL2For the ripple of 2 inductance L' of phase
Electric current.
Since Pyatyi phase buck converter works under 90 ° of phase shifts, so each phase of Pyatyi two-phase buck converter
Position should all be run with 45 ° of phase shifts.Therefore in a cycle Ts of identical duration, the switch of Pyatyi two-phase buck converter framework
Frequency is twice of the switching frequency of Pyatyi phase buck converter.As it can be seen that compared with Pyatyi phase buck converter, Pyatyi two
Phase buck converter not only increases switching frequency, and improves transient response and efficiency.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of Pyatyi phase buck type DC/DC converter, which is characterized in that including control chip, 4 pairs of complementary switch, inductance,
Capacitor, resistance, the first striding capacitance and the second striding capacitance, 4 pairs of complementary switch include the first PMOS tube and the first NMOS
Pipe, the second PMOS tube and the second NMOS tube, third PMOS tube and third NMOS tube, the 4th PMOS tube and the 4th NMOS tube, in which:
Input terminal of the source electrode of first PMOS tube as converter, first to fourth PMOS tube is according to the company to drain with source electrode
The mode of connecing is sequentially connected in series, the drain electrode leakage with the first end of the inductance and the 4th NMOS tube respectively of the 4th PMOS tube
Pole connection, the four to the first NMOS tube are sequentially connected in series according to source electrode and the connection type of drain electrode, first NMOS tube
Source electrode ground connection, the second end of the inductance is connect with the first end of the first end of the capacitor and the resistance respectively, public
The second end of output end of the end as the converter, the second end of the capacitor and the resistance is grounded；
First striding capacitance and second striding capacitance are connected across appoint respectively under the premise of not being connected across same position
Between one two pairs of adjacent complementary switch；Wherein, the striding capacitance both ends between n-th pair and (n+1)th pair of complementary switch are connected across
Full piezoelectric voltage be equal to the converter input voltage (4-n)/4, n=1,2,3；
The control chip is used to be switched on or off the complementary switch by control 4, realizes the conversion of five step voltages.
2. Pyatyi phase buck type DC/DC converter as described in claim 1, which is characterized in that first striding capacitance
Third is connected across between complementary switch and the 4th pair of complementary switch, second striding capacitance is connected across second pair of complementary switch
With third between complementary switch；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, second striding capacitance two
The full piezoelectric voltage at end is equal to the 1/2 of the input voltage.
3. Pyatyi phase buck type DC/DC converter as described in claim 1, which is characterized in that first striding capacitance
Third is connected across between complementary switch and the 4th pair of complementary switch, second striding capacitance is connected across first pair of complementary switch
Between second pair of complementary switch；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, second striding capacitance two
The full piezoelectric voltage at end is equal to the 3/4 of the input voltage.
4. Pyatyi phase buck type DC/DC converter as described in claim 1, which is characterized in that first striding capacitance
Second pair of complementary switch and third are connected across between complementary switch, second striding capacitance is connected across first pair of complementary switch
Between second pair of complementary switch；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/2 of the input voltage, second striding capacitance two
The full piezoelectric voltage at end is equal to the 3/4 of the input voltage.
5. a kind of Pyatyi phase buck type DC/DC converter, which is characterized in that including control chip, 4 pairs of complementary switch, inductance,
Capacitor, resistance, the first striding capacitance, the second striding capacitance and third striding capacitance, 4 pairs of complementary switch include the first PMOS
Pipe and the first NMOS tube, the second PMOS tube and the second NMOS tube, third PMOS tube and third NMOS tube, the 4th PMOS tube and the 4th
NMOS tube, in which:
Input terminal of the source electrode of first PMOS tube as converter, first to fourth PMOS tube is according to the company to drain with source electrode
The mode of connecing is sequentially connected in series, the drain electrode leakage with the first end of the inductance and the 4th NMOS tube respectively of the 4th PMOS tube
Pole connection, the four to the first NMOS tube are sequentially connected in series according to source electrode and the connection type of drain electrode, first NMOS tube
Source electrode ground connection, the second end of the inductance is connect with the first end of the first end of the capacitor and the resistance respectively, public
The second end of output end of the end as the converter, the second end of the capacitor and the resistance is grounded；
First striding capacitance, second striding capacitance and the third striding capacitance be not before being connected across same position
It putting, first striding capacitance and second striding capacitance are connected across respectively between any two pairs of adjacent complementary switch,
The third striding capacitance be connected across between remaining two pairs of adjacent complementary switch or the input terminal of the converter and ground
Between；Wherein, the full piezoelectric voltage for being connected across the striding capacitance both ends between n-th pair and (n+1)th pair of complementary switch is equal to described turn
(4-n)/4, n=1 of parallel operation input voltage, 2,3；It is connected across the striding capacitance both ends between the input terminal and ground of the converter
Full piezoelectric voltage be equal to the input voltage；
The control chip is used to be switched on or off the complementary switch by control 4, realizes the conversion of five step voltages.
6. Pyatyi phase buck type DC/DC converter as claimed in claim 5, which is characterized in that first striding capacitance
Third is connected across between complementary switch and the 4th pair of complementary switch, second striding capacitance is connected across second pair of complementary switch
With third between complementary switch, the third striding capacitance be connected across first pair of complementary switch and second pair of complementary switch it
Between；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, second striding capacitance two
The full piezoelectric voltage at end is equal to the 1/2 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to the input
The 3/4 of voltage.
7. Pyatyi phase buck type DC/DC converter as claimed in claim 5, which is characterized in that first striding capacitance
Third is connected across between complementary switch and the 4th pair of complementary switch, second striding capacitance is connected across second pair of complementary switch
With third between complementary switch, the third striding capacitance is connected across between the input terminal and ground of the converter；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, second striding capacitance two
The full piezoelectric voltage at end is equal to the 1/2 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to the input
Voltage.
8. Pyatyi phase buck type DC/DC converter as claimed in claim 5, which is characterized in that first striding capacitance
Third is connected across between complementary switch and the 4th pair of complementary switch, second striding capacitance is connected across first pair of complementary switch
Between second pair of complementary switch, the third striding capacitance is connected across between the input terminal and ground of the converter；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/4 of the input voltage, second striding capacitance two
The full piezoelectric voltage at end is equal to the 3/4 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to the input
Voltage.
9. Pyatyi phase buck type DC/DC converter as claimed in claim 5, which is characterized in that first striding capacitance
Second pair of complementary switch and third are connected across between complementary switch, second striding capacitance is connected across first pair of complementary switch
Between second pair of complementary switch, the third striding capacitance is connected across between the input terminal and ground of the converter；
Then the full piezoelectric voltage at first striding capacitance both ends is equal to the 1/2 of the input voltage, second striding capacitance two
The full piezoelectric voltage at end is equal to the 3/4 of the input voltage, and the full piezoelectric voltage at third striding capacitance both ends is equal to the input
Voltage.
10. a kind of Pyatyi two-phase buck converter, which is characterized in that including the described in any item Pyatyi lists of such as claim 1-9
Phase voltage-dropping type DC/DC converter, further includes:
It is selected with circuit structure and inside each device of the Pyatyi phase buck type DC/DC converter after removal capacitor, resistance
The identical another phase Pyatyi buck converter of type；Wherein, two the first PMOS that Pyatyi two-phase buck converter is included
The source electrode of pipe connects, input terminal of the common end as the Pyatyi two-phase buck converter, the Pyatyi two-phase decompression conversion
The second end for two inductance that device is included connects, output end of the common end as the Pyatyi two-phase buck converter.
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